Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already mark this as destructive, idempotent, and open-world, but the description adds substantial context beyond them: permanent deletion, missing files treated as successful deletes, possible remaining public copies/caches, upload URLs that can recreate the path, and bearer-token auth requirements.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a long single block with the core delete action placed near the end. Early sentences about illustrative URLs, download endpoints, and token headers dilute the focus and make the definition poorly front-loaded for an agent scanning for the operation's main purpose.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the presence of an output schema and rich annotations, the description still supplies the remaining operational context an agent needs: deletion side effects, idempotency behavior, auth requirements, path rules, and bucket access distinctions. It is complete for correct invocation.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, so the description must compensate, and it does: it explains path relativity to the agent namespace, separator/encoding/traversal rules, and the public/private bucket access semantics. This adds meaningful interpretation beyond the raw regex and enum.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description states a specific verb and resource: 'Permanently deletes the current file at this path.' However, this purpose is buried after several sentences about path and URL semantics, and it does not explicitly contrast itself with sibling tools such as write_storage_file or list_storage_files.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

Usage is implied by the deletion behavior and by warnings such as not issuing replacement uploads until deletion is intended to end. But there is no explicit guidance on when to choose delete_storage_file over siblings like write_storage_file, and the retrieval guidance is about a different API operation rather than this tool's selection context.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.